tpitale

tpitale

Confusing encoding variation in binary characters \f and 0x0c are the same?

I’m performing an :erlang.binary_to_term encoding (the term is {:entitlements, 1396429}). As a result, this comes out to be <<131, 104, 2, 100, 0, 12, 101, 110, 116, 105, 116, 108, 101, 109, 101, 110, 116, 115, 98, 0, 21, 78, 205>>.

If I put this into something like redis, it is encoded to look like (what I think is) an ASCII string: "\x83h\x02d\x00\x0centitlementsb\x00\x15N\xcd". I can get something similar by using IO.inspect(binaries: :as_strings). But it’s not exactly the same as what redis has. IO inspect returns: "\x83h\x02d\0\fentitlementsb\0\x15N\xCD".

One difference, is the \f vs redis having \x0c. These are both <<12>>. If you start iex and put in <<12>> it returns \f. And ?\f is 12, and 0x0c is also 12.

So, I guess my questions:

  1. How does elixir pick which format \f vs \x0c to print out?
  2. How can I pick which format to use, if at all?
  3. For bonus points: How do I get the value that IO.inspect prints without sending it to stdio?

Any information is help, thank you!

First Post! Switch mode

hauleth

hauleth

  1. It picks shorter format.
  2. AFAIK you cannot.
  3. inspect/1

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